Protection method, device and system for oil immersed transformer
Through the combination of the central controller and sensors and detectors, the fire of the oil-immersed transformer is judged and the protection operation is performed, which solves the safety accidents caused by overheating of the oil-immersed transformer and achieves the safe and reliable operation of the equipment.
Patent Information
- Application Number
- CN202411313781.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-01-10
AI Technical Summary
Oil-immersed transformers are prone to damage, short-circuit and combustion of the insulation layer due to eddy current and overheating during operation, resulting in safety accidents and property losses.
The central controller is used to connect a linear temperature sensor and a thermal imaging temperature-sensing fire detector to judge the fire through the temperature threshold and the thermal imaging image similarity, and control the safety protection components to perform safety protection operations such as power outage, sprinkler fire extinguishing or oil discharge.
Accurately judge the fire of the oil-immersed transformer, perform protection operations in a timely manner, avoid safety accidents and property losses, and ensure the safe operation of the equipment.
Smart Images
Figure CN119297918A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of oil-immersed transformers, and in particular to a protection method, device and system for an oil-immersed transformer. Background Art
[0002] Oil-immersed transformers are transformers that use oil as the main insulation means of the transformer and rely on oil as the cooling medium. The three core columns of the three-dimensional wound core of the oil-immersed transformer are arranged in an equilateral triangle. There is no air gap in the magnetic circuit, the winding is tighter, the three magnetic circuits are the same length and the shortest, and the cross-sectional area of the core column is closer to a circle, so the performance is further improved, the loss is reduced, and the noise is reduced. It is widely used in industrial and mining, steel enterprises, etc.
[0003] At present, the internal insulation materials of oil-immersed transformers are mostly made of organic combustible materials such as cardboard, cotton yarn, cloth, and wood. Oil-immersed transformers will generate large eddy currents during operation, causing the temperature to rise, leading to local overheating, causing the insulation layer wrapped outside the through screws of the oil-immersed transformer to be damaged and the area to expand, and even causing partial melting of the iron core and damage to the insulation of the nearby windings, followed by a short circuit causing combustion, which is likely to cause safety accidents and property losses. Summary of the invention
[0004] The present application provides a protection method, device and system for an oil-immersed transformer, which are used to solve the problem in the prior art that the oil-immersed transformer is prone to cause safety accidents and property losses.
[0005] In a first aspect, the present application provides a method for protecting an oil-immersed transformer, which is applied to a protection system for an oil-immersed transformer, including a central controller, an oil-immersed transformer, a safety protection component, a linear temperature sensor arranged around the outside of the oil-immersed transformer, and a thermal imaging temperature-sensitive fire detector arranged on one side of the oil-immersed transformer and at a preset distance from the oil-immersed transformer. The central controller is electrically connected to the oil-immersed transformer, the linear temperature sensor, and the thermal imaging temperature-sensitive fire detector, respectively. The method provided by the present application includes:
[0006] The central controller receives a first temperature value of the oil-immersed transformer at a current moment from a linear temperature sensor, and receives a second temperature value and a thermal imaging image from a thermal imaging temperature-sensitive fire detector;
[0007] When the first temperature value is greater than a set first temperature threshold, the second temperature value is greater than a set second temperature threshold, and the similarity between the thermal imaging image and a set standard fire thermal imaging image is greater than a set similarity threshold, it is determined that a fire occurs in the oil-immersed transformer, wherein the first temperature threshold is higher than the second temperature threshold;
[0008] In the case where it is determined that a fire occurs in the oil-immersed transformer, the safety protection component is controlled to perform a safety protection operation on the oil-immersed transformer.
[0009] In a possible implementation, the system provided by the present application further includes an early warning protection module, and the early warning protection module is electrically connected to the central controller. The method provided by the present application further includes:
[0010] The central controller determines that no fire occurs in the oil-immersed transformer when the first temperature value is less than or equal to a set first temperature threshold, the second temperature value is less than or equal to a set second temperature threshold, or the similarity between the thermal imaging image and a set standard fire thermal imaging image is less than or equal to a set similarity threshold;
[0011] When it is determined that no fire occurs in the oil-immersed transformer, a set of working state parameters of the oil-immersed transformer having a time sequence relationship within a previously preset time period from the oil-immersed transformer, a set of temperature data of the surface of the oil-immersed transformer having a time sequence relationship within a previously preset time period from a linear temperature sensor, and a working condition of the oil-immersed transformer after the current moment are obtained at the current moment;
[0012] Inputting a working state parameter set of the oil-immersed transformer, a temperature data set on the surface of the oil-immersed transformer, and the working condition of the oil-immersed transformer after the current moment into a pre-trained fire warning recognition model to predict the probability of a fire in the oil-immersed transformer, wherein the fire warning recognition model is obtained by training based on a plurality of training samples, wherein each training sample includes a working state parameter set and a temperature data set with a time series relationship of the oil-immersed transformer within a preset time length before the current moment in history, and the working condition of the oil-immersed transformer after the current moment in history, and each training sample is marked with a historical probability of a fire;
[0013] When the probability of fire in the oil-immersed transformer is greater than a set probability threshold, the early warning protection module is controlled to perform an early warning protection operation on the oil-immersed transformer.
[0014] In a possible implementation, the early warning protection module includes a control signal acquisition module and a power-off module. The central controller, the control signal acquisition module, the power-off module, and the oil-immersed transformer are electrically connected in sequence, and the control safety protection component performs an early warning protection operation for the oil-immersed transformer, including:
[0015] The central controller sends a power-off signal to the signal acquisition module;
[0016] The signal acquisition module transmits the power-off signal to the power-off module;
[0017] The power-off module cuts off the power after receiving the power-off signal to control the oil-immersed transformer to stop running.
[0018] In a possible implementation, the safety protection component includes a control signal acquisition module and a power-off module. The central controller, the control signal acquisition module, the power-off module, and the oil-immersed transformer are electrically connected in sequence. The safety protection component is controlled to perform safety protection operations for the oil-immersed transformer, including:
[0019] The central controller sends a power-off signal to the signal acquisition module;
[0020] The signal acquisition module transmits the power-off signal to the power-off module;
[0021] The power-off module cuts off the power after receiving the power-off signal to control the oil-immersed transformer to stop running.
[0022] In a possible implementation, the safety protection component includes a fire water tank, a fire water pump, a deluge valve group, and a nozzle corresponding to the oil-immersed transformer. The central controller is electrically connected to the fire water pump and the deluge valve group, respectively, and the fire water tank, the fire water pump, the deluge valve group and the nozzle are sequentially connected. Controlling the safety protection component to perform safety protection operations for the oil-immersed transformer includes:
[0023] The central controller controls the deluge valve group and the fire water pump to open, so that the fire water pump draws water from the fire water pool through the deluge valve group to the sprinkler head and sprays it to the oil-immersed transformer.
[0024] In a possible implementation manner, the inlet valve and the outlet valve of the deluge valve assembly are kept in a normally open state.
[0025] In a possible implementation, the safety protection component includes an accident oil pool and an oil unloading valve. The oil-immersed transformer, the oil unloading valve and the accident oil pool are connected in sequence. The oil unloading valve is electrically connected to the central controller. The safety protection component is controlled to perform safety protection operations for the oil-immersed transformer, including:
[0026] Control the oil unloading valve to open so that the oil in the oil-immersed transformer can flow into the accident oil pool.
[0027] In the second aspect, the present application also provides a protection device for an oil-immersed transformer, which is applied to a protection system for an oil-immersed transformer. The system includes a central controller, an oil-immersed transformer, a safety protection component, a linear temperature sensor arranged around the outside of the oil-immersed transformer, and a thermal imaging temperature-sensitive fire detector arranged on one side of the oil-immersed transformer and at a preset distance from the oil-immersed transformer. The central controller is electrically connected to the oil-immersed transformer, the linear temperature sensor, and the thermal imaging temperature-sensitive fire detector, respectively. The device provided by the present application includes:
[0028] An information receiving unit, used to receive a first temperature value of the oil-immersed transformer at a current moment from a linear temperature sensor, and to receive a second temperature value and a thermal imaging image from a thermal imaging temperature-sensitive fire detector;
[0029] a fire determination unit, configured to determine that a fire occurs in the oil-immersed transformer when the first temperature value is greater than a set first temperature threshold, the second temperature value is greater than a set second temperature threshold, and the similarity between the thermal imaging image and a set standard fire thermal imaging image is greater than a set similarity threshold, wherein the first temperature threshold is higher than the second temperature threshold;
[0030] The safety protection unit is used to control the safety protection component to perform safety protection operations on the oil-immersed transformer when it is determined that a fire occurs in the oil-immersed transformer.
[0031] In a third aspect, the present application provides a protection system for an oil-immersed transformer, comprising a central controller, an oil-immersed transformer, a linear temperature sensor arranged around the outside of the oil-immersed transformer, a safety protection component, and a thermal imaging temperature-sensitive fire detector arranged on one side of the oil-immersed transformer and at a preset distance from the oil-immersed transformer, wherein the central controller is electrically connected to the oil-immersed transformer, the linear temperature sensor, and the thermal imaging temperature-sensitive fire detector, respectively, wherein the central controller is used to execute the protection method for the oil-immersed transformer provided in the first aspect of the present application.
[0032] In a fourth aspect, the present application further provides a storage medium. When the instructions in the storage medium are executed by the central processor of the protection system of the oil-immersed transformer, the central processor can execute the protection method of the oil-immersed transformer provided in the first aspect of the present application.
[0033] The present application provides a method, device and system for protecting an oil-immersed transformer, which can receive a first temperature value of the oil-immersed transformer at the current moment from a linear temperature sensor, and receive a second temperature value and a thermal imaging image from a thermal imaging temperature-sensitive fire detector. When the first temperature value is greater than a set first temperature threshold, it means that the surface temperature of the oil-immersed transformer is particularly high, and may have reached the temperature at which a fire occurs; when the second temperature value is greater than a set second temperature threshold, it means that the temperature of the surrounding environment of the oil-immersed transformer is also relatively high, indicating that the probability of a fire occurring in the oil-immersed transformer is particularly high;
[0034] When the similarity between the thermal imaging image and the set standard fire thermal imaging image is greater than the set similarity threshold, it is determined that a fire has occurred in the oil-immersed transformer. It can be seen that the basis for determining that a fire has occurred in the oil-immersed transformer includes not only that the first temperature value is greater than the set first temperature threshold, but also that the second temperature value is greater than the set second temperature threshold, and that the similarity between the thermal imaging image and the set standard fire thermal imaging image is greater than the set similarity threshold; in this way, it is possible to accurately determine that a fire has occurred in the oil-immersed transformer, and further, it is possible to reliably avoid causing safety accidents and property losses. BRIEF DESCRIPTION OF THE DRAWINGS
[0035] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.
[0036] Figure 1 A schematic diagram of the structure of the protection system for the oil-immersed transformer provided in an embodiment of the present application;
[0037] Figure 2 One of the flow charts of the oil-immersed transformer protection method provided in the embodiment of the present application;
[0038] Figure 3 The second flowchart of the oil-immersed transformer protection method provided in the embodiment of the present application;
[0039] Figure 4 This is a functional module block diagram of the protection device for an oil-immersed transformer provided in an embodiment of the present application. DETAILED DESCRIPTION
[0040] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present disclosure. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present disclosure.
[0041] Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may further design regions / layers with different shapes, sizes, and relative positions according to actual needs.
[0042] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, the layer / element may be directly on the other layer / element or an intervening layer / element may exist therebetween. In addition, if a layer / element is "on" another layer / element in one orientation, the layer / element may be "below" the other layer / element when the orientation is reversed.
[0043] The following is a detailed description of the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.
[0044] The embodiment of the present application provides a protection method for an oil-immersed transformer, which is applied to a protection system for an oil-immersed transformer. Figure 1 As shown, the oil-immersed transformer protection system provided by the present application includes a central controller 13, an oil-immersed transformer 21, a safety protection component, a linear temperature sensor 11 arranged around the outside of the oil-immersed transformer 21, and a thermal imaging temperature-sensitive fire detector 10 arranged on one side of the oil-immersed transformer 21 and at a preset distance from the oil-immersed transformer 21. The central controller 13 is electrically connected to the oil-immersed transformer 21, the linear temperature sensor 11, and the thermal imaging temperature-sensitive fire detector 10, respectively. Figure 2 As shown, the method provided in the embodiment of the present application includes:
[0045] S201 : the central controller 13 receives a first temperature value of the oil-immersed transformer 21 at a current moment from the linear temperature sensor 11 , and receives a second temperature value and a thermal imaging image from the thermal imaging fire detector 10 .
[0046] S202: Determine whether the first temperature value is greater than a set first temperature threshold, whether the second temperature value is greater than a set second temperature threshold, and whether the similarity between the thermal imaging image and the set standard fire thermal imaging image is greater than a set similarity threshold. If yes, execute S203. Optionally, Figure 3 As shown, if not, execute S205.
[0047] The first temperature threshold is higher than the second temperature threshold.
[0048] S203: Determine that a fire occurs in the oil-immersed transformer 21 .
[0049] S204 : Control the safety protection component to perform safety protection operations on the oil-immersed transformer 21 .
[0050] The specific implementation of S204 includes but is not limited to the following two:
[0051] The first one: still Figure 1As shown, the safety protection component includes a control signal acquisition module 27 and a power-off module 28, and the central controller 13, the control signal acquisition module 27, the power-off module 28 and the oil-immersed transformer 21 are electrically connected in sequence. S204 can be specifically implemented as follows: the central controller 13 sends a power-off signal to the signal acquisition module 27; the signal acquisition module 27 transmits the power-off signal to the power-off module 28; the power-off module 28 powers off after receiving the power-off signal, so as to control the oil-immersed transformer 21 to stop running.
[0052] In this way, when the oil-immersed transformer 21 stops running, the oil-immersed transformer 21 no longer generates heat, and a short circuit of the oil-immersed transformer 21 caused by a fire is avoided.
[0053] The second type: still Figure 1 As shown, the safety protection component includes a fire water tank 16, a fire water pump 17, a rain shower valve group 18, and a nozzle 29 corresponding to the oil-immersed transformer 21. The central controller 13 is electrically connected to the fire water pump 17 and the rain shower valve group 18, respectively, and the fire water tank 16, the fire water pump 17, the rain shower valve group 18 and the nozzle 29 are connected in sequence (through the water supply pipeline). S204 can be specifically implemented as follows:
[0054] The central controller 13 controls the sprinkler valve group 18 and the fire pump 17 to open, so that the fire pump 17 draws the water in the fire pool 16 to the nozzle 29 through the sprinkler valve group 18, and sprays it to the oil-immersed transformer 21. In the embodiment of the present application, the inlet valve 19 of the sprinkler valve group 18 is in a water-filled state, and the outlet valve 20 is in a water-free state. The inlet valve 19 and the outlet valve 20 of the sprinkler valve group 18 remain in a normally open state, which saves the startup time of the sprinkler valve group 18, ensures that the water for fire extinguishing reaches the scene quickly, and avoids the bursting of water pipes due to low temperature in winter; the water supply pipeline can be set at a distance of no more than 1.5 meters from the oil-immersed transformer 21, evenly arranged and arranged at a spacing of 2m; the nozzle 29 can be set at the top of the water supply pipeline, used to spray water to the oil-immersed transformer 21 to extinguish the fire, so that the water sprayed by the sprinkler valve group 18 can extinguish the fire.
[0055] The third type: the safety protection component includes an oil discharge controller 23, an accident oil pool 25 and an oil discharge valve 24. The oil-immersed transformer 21, the oil discharge valve 24 and the accident oil pool 25 are connected in sequence. The central controller 13 notifies the oil discharge controller 23 to control the oil discharge valve 24 to open, so that the oil in the oil-immersed transformer 21 flows into the accident oil pool 25. Since oil is a flammable item, the oil in the oil-immersed transformer 21 flows into the accident oil pool 25, which can contain the fire.
[0056] In summary, the oil-immersed transformer protection method provided in the embodiment of the present application can receive the first temperature value of the oil-immersed transformer 21 at the current moment from the linear temperature sensor 11, and receive the second temperature value and thermal imaging image from the thermal imaging temperature-sensitive fire detector 10. When the first temperature value is greater than the set first temperature threshold, it means that the surface temperature of the oil-immersed transformer 21 is particularly high, and may have reached the temperature at which a fire occurs; when the second temperature value is greater than the set second temperature threshold, it means that the temperature of the surrounding environment of the oil-immersed transformer 21 is also relatively high, indicating that the probability of a fire occurring in the oil-immersed transformer 21 is particularly high;
[0057] When the similarity between the thermal imaging image and the set standard fire thermal imaging image is greater than the set similarity threshold, it is determined that a fire has occurred in the oil-immersed transformer 21. It can be seen that the basis for determining that a fire has occurred in the oil-immersed transformer 21 includes not only that the first temperature value is greater than the set first temperature threshold, but also that the second temperature value is greater than the set second temperature threshold, and that the similarity between the thermal imaging image and the set standard fire thermal imaging image is greater than the set similarity threshold; in this way, it is possible to accurately determine that a fire has occurred in the oil-immersed transformer 21, and further, it is possible to reliably avoid causing safety accidents and property losses.
[0058] Optionally, the system provided in the embodiment of the present application further includes an early warning protection module, which is electrically connected to the central controller 13. Figure 3 As shown, the method provided in the embodiment of the present application also includes:
[0059] S205: Determine that no fire occurs in the oil-immersed transformer 21.
[0060] S206: At the current moment, obtain a set of working state parameters of the oil-immersed transformer 21 that have a time sequence relationship with the oil-immersed transformer 21 within a previously preset time period, a set of temperature data on the surface of the oil-immersed transformer 21 that have a time sequence relationship with the oil-immersed transformer 21 from the linear temperature sensor 11 within a previously preset time period, and the working condition of the oil-immersed transformer 21 after the current moment.
[0061] Among them, the preset time length can be 10 minutes, 20 minutes, etc., which is not limited here. The working state parameters of the oil-immersed transformer 21 at each moment may include the working current, voltage, etc. of the oil-immersed transformer 21. It can be understood that the working state parameters of the oil-immersed transformer 21 are associated with the temperature data on the surface of the oil-immersed transformer 21, and the working condition of the oil-immersed transformer 21 after the current moment can characterize the working state parameters of the oil-immersed transformer 21 after the current moment. It has been found through research that the working state parameters of the oil-immersed transformer 21 are one of the important factors that cause the oil-immersed transformer 21 to generate high temperature and cause fire.
[0062] S207: Input the working state parameter set of the oil-immersed transformer 21, the temperature data set of the surface of the oil-immersed transformer 21, and the working condition of the oil-immersed transformer 21 after the current moment into the pre-trained fire warning recognition model to predict the probability of fire in the oil-immersed transformer 21.
[0063] Among them, the fire warning recognition model is obtained by training based on multiple training samples, wherein each training sample includes a set of working state parameters and a set of temperature data with a time series relationship of the oil-immersed transformer 21 within a preset time period before the current historical moment, and the working condition of the oil-immersed transformer 21 after the current historical moment, and each training sample is marked with the historical probability of a fire.
[0064] It can be understood that by inputting the working state parameter set of the oil-immersed transformer 21, the temperature data set on the surface of the oil-immersed transformer 21, and the working condition of the oil-immersed transformer 21 after the current moment into the pre-trained fire warning recognition model, the temperature of the surface of the oil-immersed transformer 21 after the current moment can be predicted, and then based on the predicted surface temperature of the oil-immersed transformer 21, the probability of fire in the oil-immersed transformer 21 can be predicted.
[0065] S208 : When the probability of fire in the oil-immersed transformer 21 is greater than a set probability threshold, the early warning protection module is controlled to perform an early warning protection operation on the oil-immersed transformer 21 .
[0066] Exemplarily, the early warning protection module may also include a control signal acquisition module 27 and a power-off module 28 , and the central controller 13 , the control signal acquisition module 27 , the power-off module 28 and the oil-immersed transformer 21 are electrically connected in sequence.
[0067] The central controller 13 sends a power-off signal to the signal acquisition module 27 ; the signal acquisition module 27 transmits the power-off signal to the power-off module 28 ; the power-off module 28 cuts off the power after receiving the power-off signal, so as to control the oil-immersed transformer 21 to stop running.
[0068] It can be understood that the oil-immersed transformer 21 will no longer generate heat after stopping operation, which greatly reduces the probability of fire, thereby achieving the purpose of early warning and preventing fire.
[0069] See also Figure 4The embodiment of the present application also provides a protective device 400 for an oil-immersed transformer, which is applied to a protection system for an oil-immersed transformer. The device includes a central controller 13, an oil-immersed transformer 21, a safety protection component, a linear temperature sensor 11 disposed around the outside of the oil-immersed transformer 21, and a thermal imaging temperature-sensitive fire detector 10 disposed on one side of the oil-immersed transformer 21 and at a preset distance from the oil-immersed transformer 21. The central controller 13 is electrically connected to the oil-immersed transformer 21, the linear temperature sensor 11, and the thermal imaging temperature-sensitive fire detector 10, respectively. The device 400 provided by the present application includes:
[0070] The information receiving unit 401 is used to receive the first temperature value of the oil-immersed transformer 21 at the current moment from the linear temperature sensor 11, and receive the second temperature value and the thermal imaging image from the thermal imaging temperature fire detector 10;
[0071] The fire determination unit 402 is used to determine that a fire occurs in the oil-immersed transformer 21 when the first temperature value is greater than a set first temperature threshold, the second temperature value is greater than a set second temperature threshold, and the similarity between the thermal imaging image and a set standard fire thermal imaging image is greater than a set similarity threshold, wherein the first temperature threshold is higher than the second temperature threshold;
[0072] The safety protection unit 403 is used to control the safety protection component to perform a safety protection operation on the oil-immersed transformer 21 when it is determined that a fire occurs in the oil-immersed transformer 21 .
[0073] The system provided in the embodiment of the present application further includes an early warning protection module, which is electrically connected to the central controller 13. The fire determination unit 402 is further configured to determine that no fire has occurred in the oil-immersed transformer 21 when the first temperature value is less than or equal to a set first temperature threshold, the second temperature value is less than or equal to a set second temperature threshold, or the similarity between the thermal imaging image and a set standard fire thermal imaging image is less than or equal to a set similarity threshold.
[0074] The information receiving unit 401 is also used to obtain, when it is determined that no fire has occurred in the oil-immersed transformer 21, a set of working state parameters of the oil-immersed transformer 21 that have a time sequence relationship with the oil-immersed transformer 21 at the current moment, a set of temperature data on the surface of the oil-immersed transformer 21 that have a time sequence relationship with the oil-immersed transformer 21 from the linear temperature sensor 11 within the previous preset time length, and the working condition of the oil-immersed transformer 21 after the current moment.
[0075] The device 400 provided in the embodiment of the present application also includes: a probability prediction unit, which is used to input the working state parameter set of the oil-immersed transformer 21, the temperature data set on the surface of the oil-immersed transformer 21, and the working condition of the oil-immersed transformer 21 after the current moment into a pre-trained fire warning recognition model to predict the probability of a fire in the oil-immersed transformer 21, wherein the fire warning recognition model is obtained by training based on multiple training samples, wherein each training sample includes a working state parameter set and a temperature data set with a time series relationship of the oil-immersed transformer 21 within a preset time length before the current historical moment, and the working condition of the oil-immersed transformer 21 after the current historical moment, and each training sample is marked with a historical probability of a fire.
[0076] The early warning protection unit is used to control the early warning protection module to perform an early warning protection operation on the oil-immersed transformer 21 when the probability of fire in the oil-immersed transformer 21 is greater than a set probability threshold.
[0077] In some embodiments, the safety protection component includes a fire water pool 16, a fire water pump 17, a deluge valve group 18, and a nozzle 29 corresponding to the oil-immersed transformer 21. The central controller 13 is electrically connected to the fire water pump 17 and the deluge valve group 18, respectively, and the fire water pool 16, the fire water pump 17, the deluge valve group 18, and the nozzle 29 are sequentially connected. The safety protection unit 403 is specifically used to control the deluge valve group 18 and the fire water pump 17 to open, so that the fire water pump 17 draws water in the fire water pool 16 through the deluge valve group 18 to the nozzle 29 and sprays it to the oil-immersed transformer 21. Optionally, the inlet valve 19 and the outlet valve 20 of the deluge valve group 18 remain in a normally open state.
[0078] In a possible implementation, the safety protection component includes an oil discharge controller 23, an emergency oil pool 25, and an oil discharge valve 24. The oil-immersed transformer 21, the oil discharge valve 24, and the emergency oil pool 25 are sequentially connected, and the oil discharge valve 24 is electrically connected to the central controller 13. The safety protection unit 403 is specifically used to notify the oil discharge controller 23 to control the oil discharge valve 24 to open, so that the oil in the oil-immersed transformer 21 flows into the emergency oil pool 25.
[0079] Still see Figure 1 The present application also provides a protection system for an oil-immersed transformer, comprising a central controller 13, an oil-immersed transformer 21, a linear temperature sensor 11 arranged around the outside of the oil-immersed transformer 21, a safety protection component, and a thermal imaging temperature-sensitive fire detector 10 arranged on one side of the oil-immersed transformer 21 and at a preset distance from the oil-immersed transformer 21. The central controller 13 is electrically connected to the oil-immersed transformer 21, the linear temperature sensor 11, and the thermal imaging temperature-sensitive fire detector 10, respectively, wherein the central controller 13 is used to execute the protection method for the oil-immersed transformer provided in the above-mentioned embodiment of the present application.
[0080] In addition, an embodiment of the present application further provides a storage medium. When the instructions in the storage medium are executed by the central processor of the protection system of the oil-immersed transformer, the central processor can execute the protection method of the oil-immersed transformer provided in the first aspect of the present application.
[0081] In the above description, the technical details such as the patterning of each layer are not described in detail. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of desired shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not completely the same as the methods described above. In addition, although the various embodiments are described above separately, this does not mean that the measures in the various embodiments cannot be used in combination to advantage.
[0082] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.
[0083] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.
Claims
1. A method for protecting an oil-immersed transformer, characterized in that: A protection system for an oil-immersed transformer, the system comprising a central controller, an oil-immersed transformer, a safety protection component, a linear temperature sensor disposed around the outside of the oil-immersed transformer, and a thermal imaging temperature-sensitive fire detector disposed on one side of the oil-immersed transformer and at a preset distance from the oil-immersed transformer, the central controller being electrically connected to the oil-immersed transformer, the linear temperature sensor, and the thermal imaging temperature-sensitive fire detector, respectively, and the method comprising: The central controller receives a first temperature value of the oil-immersed transformer at a current moment from the linear temperature sensor, and receives a second temperature value and a thermal imaging image from the thermal imaging temperature-sensitive fire detector; In the case where the first temperature value is greater than a set first temperature threshold, the second temperature value is greater than a set second temperature threshold, and the similarity between the thermal imaging image and a set standard fire thermal imaging image is greater than a set similarity threshold, it is determined that a fire occurs in the oil-immersed transformer, wherein the first temperature threshold is higher than the second temperature threshold; When it is determined that a fire occurs in the oil-immersed transformer, the safety protection component is controlled to perform a safety protection operation on the oil-immersed transformer.
2. The method according to claim 1, characterized in that The system further includes an early warning protection module, which is electrically connected to the central controller. The method further includes: The central controller determines that no fire has occurred in the oil-immersed transformer when the first temperature value is less than or equal to a set first temperature threshold, the second temperature value is less than or equal to a set second temperature threshold, or the similarity between the thermal imaging image and a set standard fire thermal imaging image is less than or equal to a set similarity threshold; In the case where it is determined that no fire occurs in the oil-immersed transformer, a set of working state parameters of the oil-immersed transformer having a time sequence relationship from the oil-immersed transformer in a previously preset time period, a set of temperature data of the surface of the oil-immersed transformer having a time sequence relationship from the linear temperature sensor in a previously preset time period, and the working condition of the oil-immersed transformer after the current moment are obtained at the current moment; Inputting the working state parameter set of the oil-immersed transformer, the temperature data set on the surface of the oil-immersed transformer, and the working condition of the oil-immersed transformer after the current moment into a pre-trained fire warning recognition model to predict the probability of fire in the oil-immersed transformer, wherein the fire warning recognition model is obtained by training based on a plurality of training samples, wherein each of the training samples includes a working state parameter set and a temperature data set having a time series relationship within a preset time length before the current historical moment of the oil-immersed transformer, and the working condition of the oil-immersed transformer after the current historical moment, and each of the training samples is marked with a historical probability of fire; When the probability of fire in the oil-immersed transformer is greater than a set probability threshold, the early warning protection module is controlled to perform an early warning protection operation on the oil-immersed transformer.
3. The method according to claim 2, characterized in that The early warning protection module includes a control signal acquisition module and a power-off module. The central controller, the control signal acquisition module, the power-off module and the oil-immersed transformer are electrically connected in sequence. The control of the safety protection component to perform an early warning protection operation for the oil-immersed transformer includes: The central controller sends a power-off signal to the signal acquisition module; The signal acquisition module transmits the power-off signal to the power-off module; The power-off module cuts off power after receiving the power-off signal, so as to control the oil-immersed transformer to stop running.
4. The method according to claim 1, characterized in that: The safety protection component includes a control signal acquisition module and a power-off module. The central controller, the control signal acquisition module, the power-off module and the oil-immersed transformer are electrically connected in sequence. The control of the safety protection component to perform safety protection operations for the oil-immersed transformer includes: The central controller sends a power-off signal to the signal acquisition module; The signal acquisition module transmits the power-off signal to the power-off module; The power-off module cuts off power after receiving the power-off signal, so as to control the oil-immersed transformer to stop running.
5. The method according to claim 1, characterized in that The safety protection component includes a fire water tank, a fire water pump, a deluge valve group, and a nozzle corresponding to the oil-immersed transformer. The central controller is electrically connected to the fire water pump and the deluge valve group, respectively, and the fire water tank, the fire water pump, the deluge valve group and the nozzle are sequentially connected. The control of the safety protection component to perform the safety protection operation for the oil-immersed transformer includes: The central controller controls the deluge valve group and the fire water pump to open, so that the fire water pump draws water in the fire water pool to the sprinkler head through the deluge valve group and sprays it toward the oil-immersed transformer.
6. The method according to claim 5, characterized in that The inlet valve and the outlet valve of the deluge valve group are kept in a normally open state.
7. The method according to claim 1, characterized in that The safety protection component includes an oil discharge controller, an emergency oil pool and an oil discharge valve. The oil-immersed transformer, the oil discharge valve and the emergency oil pool are connected in sequence. The oil discharge valve is electrically connected to the central controller. The control of the safety protection component to perform safety protection operations for the oil-immersed transformer includes: The oil discharge controller is notified to control the oil discharge valve to open, so that the oil in the oil-immersed transformer flows into the accident oil pool.
8. A protective device for an oil-immersed transformer, characterized in that: A protection system for an oil-immersed transformer, the system comprising a central controller, an oil-immersed transformer, a safety protection component, a linear temperature sensor disposed around the outside of the oil-immersed transformer, and a thermal imaging temperature-sensitive fire detector disposed on one side of the oil-immersed transformer and at a preset distance from the oil-immersed transformer. The central controller is electrically connected to the oil-immersed transformer, the linear temperature sensor, and the thermal imaging temperature-sensitive fire detector, respectively. The device comprises: An information receiving unit, used to receive a first temperature value of the oil-immersed transformer at a current moment from the linear temperature sensor, and to receive a second temperature value and a thermal imaging image from the thermal imaging temperature-sensitive fire detector; a fire determination unit, configured to determine that a fire occurs in the oil-immersed transformer when the first temperature value is greater than a set first temperature threshold, the second temperature value is greater than a set second temperature threshold, and the similarity between the thermal imaging image and a set standard fire thermal imaging image is greater than a set similarity threshold, wherein the first temperature threshold is higher than the second temperature threshold; The safety protection unit is used to control the safety protection component to perform a safety protection operation on the oil-immersed transformer when it is determined that a fire occurs in the oil-immersed transformer.
9. A protection system for an oil-immersed transformer, characterized in that: The system includes a central controller, an oil-immersed transformer, a linear temperature sensor arranged around the outside of the oil-immersed transformer, a safety protection component, and a thermal imaging temperature-sensitive fire detector arranged on one side of the oil-immersed transformer and at a preset distance from the oil-immersed transformer. The central controller is electrically connected to the oil-immersed transformer, the linear temperature sensor, and the thermal imaging temperature-sensitive fire detector, respectively, wherein the central controller is used to execute the oil-immersed transformer protection method as described in any one of claims 1 to 7.
10. A storage medium, when instructions in the storage medium are executed by a central processor of a protection system for an oil-immersed transformer, the central processor is enabled to execute the oil-immersed transformer protection method according to any one of claims 1 to 7.